Choline precursors
Alpha-GPC vs CDP-Choline
The table compares the compounds’ key data from their entry pages. Open each compound’s full entry for details. Educational content, not medical advice.
| Alpha-GPC | CDP-Choline | |
|---|---|---|
| What it is | Glycerophosphocholine, a bioavailable choline precursor. | Cytidine diphosphate-choline, dual choline + uridine precursor. |
| Mechanism | Choline precursor (ACh synthesis) | Choline + uridine precursor |
| Half-life | ~4-6 h | ~56 h (two phases) |
| Legal status | EU Rx (IT) / OTC elsewhere | EU Rx / USA OTC |
| Full entry | Open → | Open → |
What it is
Alpha-GPCGlycerophosphocholine, a bioavailable choline precursor.
CDP-CholineCytidine diphosphate-choline, dual choline + uridine precursor.
Mechanism
Alpha-GPCCholine precursor (ACh synthesis)
CDP-CholineCholine + uridine precursor
Half-life
Alpha-GPC~4-6 h
CDP-Choline~56 h (two phases)
Legal status
Alpha-GPCEU Rx (IT) / OTC elsewhere
CDP-CholineEU Rx / USA OTC
Full entry